"She was hiking in the Grand Canyon with Laura and her nephew Evan," Beadle explained in the Facebook post. "Laura was feeling dizzy from heat exhaustion and they had run out of water. Sarah left Laura and Evan in a safe location while she went ahead to get water and some help."

The children were discovered by park rangers and are safe, officials said.

Beadle's backpack was found near the junction of the South Kaibab Trail and the River Trail. Search teams discovered Sarah's body Wednesday afternoon near the Black Bridge, park officials said in a news release Thursday.

Sarah was considered to be an experienced backpacker and hiker who last hiked at the Grand Canyon in 2002.

A mother of five, Beadle worked at Baylor Emergency Medical Center in Keller.

The hospital issued a statement Thursday, saying, "Our thoughts and prayers are with the friends, family and colleagues of Dr. Sarah Beadle, an emergency medical physician who worked for 24 Hour Physicians, Inc., at Baylor Emergency Medical Center at Keller."

"Dr. Beadle was a beloved member of our team, and she’ll be missed by all with whom she came in contact, having worked at the medical center for a year and a half," the statement said. "We would like to thank the dedicated first responders and search teams who worked tirelessly yesterday."

Our thoughts and prayers are with the friends, family and colleagues of Dr. Sarah Beadle, an emergency medical physician who worked for 24 Hour Physicians, Inc., at Baylor Emergency Medical Center at Keller.

Dr. Beadle was a beloved member of our team, and she’ll be missed by all with whom she came in contact, having worked at the medical center for a year and a half.

We would like to thank the dedicated first responders and search teams who worked tirelessly yesterday. At this difficult time, we ask for privacy for her colleagues and family.